build

Add doc generator for events. Add event doc. Fixes #2593 #4780

Job	Run time
Fablab HA Smoketest	12m 19s
Fablab Smoketest	17m 9s
Build Linux binaries	4m 28s
Build Mac OS binaries	3m 0s
Run Unit and Integration Tests	7m 54s
Build Windows binaries	5m 39s
Teardown HA SmokeTest	2m 14s
Publish Binaries	56s
Teardown SmokeTest	1m 38s
Publish Release Candidate Linux Packages	0s
Publish Release Candidate Docker Images	0s
	55m 17s

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